Web Reference: Solutions to all the easy, medium and hard challenges compiled with related learning resources for the Linux Shell Challenges on HackerRank. Domains included: Let's Echo! Functions and Fractals - Recursive Trees - Bash! Lonely Integer - Bash! Solution based on side lengths. bc -l produces up to 6 decimal places. If we use bc scale to 3, for instance, depending on the result, we would produce wrong results because printf %f format specifier does rounding by itself. bc scale is 0 by default if not explicitly set. Also, bc does no rounding. 1.258 $ printf '%.3f\n' 1.2585. Bash and command-line tools can be very powerful. Test your Linux scripting skills.
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Last Updated: April 7, 2026
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